- Sports memorabilia market reportedly has grown exponentially more lucrative in recent years.
- Sale of rare Mantle card broke record set just few months ago — $9.3 million for the jersey worn by late-soccer star Diego Maradona.
- In baseball card sales, Mantle transaction surpassed $7.25 million for a century-old Honus Wagner card recently sold in private deal.
- The late-Mantle, a hall of famer, played entire Major League Baseball career, which ended in 1968, with New York Yankees.
